Year	Percent
1996-01-01	33.2269
1997-01-01	38.8356
1998-01-01	33.1553
1999-01-01	37.0465
2000-01-01	33.6805
2001-01-01	33.9252
2002-01-01	32.5946
2003-01-01	31.9621
2004-01-01	34.5398
2005-01-01	30.9455
2006-01-01	29.4449
2007-01-01	29.8688
2008-01-01	30.8975
2009-01-01	32.7954
2010-01-01	36.4463
2011-01-01	49.3484
2012-01-01	49.0374
2013-01-01	45.8889
2014-01-01	50.2079